一天24小时中时针转2圈,分针转24圈,所以分针要超过时针的圈数是:
24-2=22(圈),
分针每超过时针一圈,前后各有一次垂直,所以一天24小时中分针与时针垂直的次数是:
(24-2)×2,
=22×2,
=44(次).
答:一天24小时中分针与时针垂直共有44次.
故答案为:44.
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